Cluster 1: Keywords included ferroptosis, apoptosis, autophagy, necroptosis, pyroptosis, immunotherapy, immunogenic cell death (ICD), immune checkpoint blockade, gastric cancer, hepatocellular carcinoma, melanoma, tumor microenvironment, overall survival, PD-1, PD-L1, and prognosis. The gene discussed is SNCA; the disease is neoplasm.